Hydraulic pumping system



R. BA BRYANT A 2,013,129

HYDRAULIC PUMPING SYSTEM Filed Feb. 2s, lesIs 2 sheets-sheet 1 F G. l

INVENTOR.

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Sept. 3, 1935. R. B. BRYANT HYDRAULIC PUMPING S'YYSTEM Filed Feb. 25, 1935 2 Sheets-Sheet 2 AaZ I N VEN TOR. d? i Patented Sept. 3, 1935 N UNITED sTArss g annua agrar orties 7 Claims.

'This invention relates to new and useful improvements in hydraulic pumping systems.

One object of the invention is to provide an improved hydraulic pumping system for oil and water wells and particularly for deep wells.

An important object of the invention is to provide a pumping apparatus in which the elements may be arranged one within the other and lowered into the casing.

Another object of the invention is to provide a controlling apparatus on the surface, whereby the pumping operation of one or more wells may be controlled.

A particular object of the invention is to provide an l improved pumping apparatus of the balanced pressure type, but in which a comparatively small number of parts are required and in which the operation will be simple and positive.

A construction designed to carry out the invention will be hereinafter described, together with other features of the invention.

The invention will be more readily understood from a reading of the following speciiication and by reference to the accompanying drawings in which an example of the invention is shown, and wherein:

Figure l is an elevation of a pumping apparatus constructed in accordance with the invention,

Figure 2 is a vertical sectional view of the same, in position in the casing,

Figure 3 is an elevation of the operating and controlling mechanism, and

Figures 4 and 5 are diagrammatical views of the control valve.

In the drawings the numeral I designates a lower pump cylinder and 2 an enlarged upper pump cylinder, preferably integral with the lower cylinder. A tubular piston 3 has a snug sliding fit in the lower cylinder and carries at its upper end ian enlarged tubular piston li having a snug sliding fit in the cylinder 2. These pistons are connected so as to move in unison. A section of tubing is mounted axially in the cylinders and the pistons and is provided with a reduced screwthreaded nipple Ill at its lower end, which is screwed through the bottom of the cylinder I. The outer surface of the tubing is machined so that the pistons 3 and Il have a snug sliding fit thereon. The cylinder 2 is provided with external lugs I3, which act to center the cylinders in the casing I2,

A valve sleeve 36 is mounted in the lower portion of the tubing 5 and rests upon a packing gasket 3B. The upper end of the sleeve is packedoff by a packing 3l engaging the tubing.` This leaves an annular vertical space between the sleeve and the tubing. It is also pointed out that annular vertical spaces are provided between the pistons 3 and 4 and the tubing. A valve IU is seated in the lower end of the sleeve and a spring-pressed valve II is seated in the sleeve a substantial distance above the valve It. Ports 6 in the tubing permit fluid to ilow from the cylinder I into the space between the tubing and the Valve sleeve. Thereare two sets of ports 5, and the upper set is placed opposite ports 'I in the valve sleeve above the valve I5 and below the valve il. When fluid enters through the nipple Ill and unseats the valve Iii, which is of the wing type, said fluid may flow out through the ports I into the space between the sleeve and the piston and then escape through the ports 6` into the cylinder I. The spring-pressed valve Il will remain closed.

The wall of the piston li is made suciently thick to form a weight I'I, which is supported on a coiled spring 34 resting on the bottom of the cylinder 2. Ports 8 in the tubingrare normally opposite ports 9 in the upper end of the piston 3. Assuming the pistons 3 and l to be elevated and unrestrained,4 it is obvious that the weight Il will force the same downwardly and the spring 34 will cushion this drop. When the pistons move downwardly liquid will be forced from the cylinder I through the ports 5 and 'l into the sleeve 35j The valve I!) will, of course, be held to its seat, but the valve II will be lifted and the liquid elevated past said valve through the sleeve 36 into the tubing 5. Liquid in the cylinder 2 will be forced through the ports 8 and 9 into the tubing 5. When pressure is applied to the fluid in the tubing 5, the valve Ii will be seated, thus causingthe liquid to flow through the ports 8 and 9 under pressure and elevate the pistons, whereby suction will be created in the cylinder I and liquid drawn thereinto in the manner previously described.

In Figure `3 I have shown the controlling and operating means, which includes .apump I8 driven by a motor I9. The pump is of the reciprocating type .and has a pinion on its shaft, driving a gear 2l, which is provided with a cam track or groove 28. A lever 23, pivoted at its lower end to the base of the apparatus, has a roller 22 intermediate its ends engaging in the cam track. A link 24 connects the upper end of the lever with the arm 25 of a control valve I6. It is obvious that as the gear 2I is revolved, the cam will swing the lever 23, whereby the arm 25 will shift the valve gate 29 from the position shown in Figure 4 to the position shown in Figure 5 and vice versa.

The valve is provided with a connection 30 leading into a tank I5, which has an overow discharge 3I leading to the storage tanks or other point. The valve has two outlets, one marked No. 1 and the other marked No. 2. These outlets are connected with the tubing 5 in No. 1 well and the tubing 5 in a No. 2 well. In the position shown in Figure 5, liquid is free to flow through the outlet No. 1 to the tank I5. When the valve is shifted to the position shown in Figure 4, No. 1 well is out oif ironr the tank, but liquid is free to flow through the outlet No. 2 to the tank from the No. 2 well. The stem I6' of the valve is connected by a pipe 2l with the pump i8 and the pump I3 is connected with the tank by a suction pipe 26.

In operating the system, the pump I8 is continuously acting and by connecting two wells there is no idle pumping period. It will be as- Sumed that all pipes and parts are full of liquid and the valve gate 29 is in the position shown in Figure 4. The pump i3 will be forcing liquid from the tank l5 through the pipe 2l to the outlet No. 1 and thence into the tubing 5 of No. 1 well. This fiuid passes through the ports 8 and 9 and acting against the piston ll, elevates said piston, together with the piston 3. The piston 2i thus throiuli its suction strobe, whereby liquid is drawn in through the inlet Ill past the valve lil into the sleeve 36 and thence through the ports G and 'i into the cylinder l.

While the pump i8 is forcing liquid into No. 1 well, the weight il in No. 2 well is descending, whereby liquid is being forced from the cylinder i through the ports 6 and l and past the valve l! and thereby being elevated in the tubing 5. This liquid is entering the valve i8 through the No. 2 outlet (Figure from which it ilows through the connection 3i) to the tank l5. Once during each revolution of the gear 2i, the lever 23 is shifted so that during substantially one-half 0f the revolution of said gear the gate 2S is in the position shown in Figure 4 and during the remaining half of the revolution said gate is in the position shown in Figure 5. Therefore, during one-half of the revolutionl of said gear the pump I8 is forcing liquid into the tubing of one well and during the remaining half it is forcing liquid into the other Well. When liquid is being forced into one well the weight l1 in the other well is causing a discharge of liquid therefrom, as will be obvious.

It is pointed out that each outlet No. 1 and No. 2 could be connected to several wells and any one of these wells could be cut on when it was not desired to pump the same. When the weight il descends, considerable momentum will be given to the discharging column of iiuid and this will cause the now to continue for a brief period. The pump i8 merely has to elevate the weight I1 and as the same is balanced against the column of fluid, it is obvious that a small highspeed pump is all that is necessary.

The description which has been given recites more or less detail of a particular embodiment of the invention, which is set forth as new and useful; however, I desire it understood that the invention is not limited to such exact details of construction, because it is manifest that changes and modifications may be made within the scope of the appended claims, without departing from the spirit of the invention.

What I claim and to secure by Letters Patent, is:

A hydraulic pumping system comprising, a pumping cylinder adapted to b-e low-ered into a well, a piston operating in said cylinder, a stationary tubing in said piston, the tubing coinmunicating with the cylinder through the piston and below the piston, valves within the-tubing, and means carriedby the piston for forcing the same downwardly to displace liquid from the cylinder into the tubing and also to discharge it from the tubing.

2. A hydraulic pumping system comprising, a pumping cylinder adapted to be lowered into a well, a piston operating in said cylinder, a stationary tubing in said piston, the tubing communicating with the cylinder through the piston and below the piston, valves within the tubing, means carried by the piston for forcin'T the same downwardly to displace liquid from the cylinder into the tubing and also to discharge it from the tubing, and means for elevating the piston to ldraw liquid into the tubing and cylinder.

3. A hydraulic pumping system comprising, a cylinder adapted to be lowered into a well, a tubing extending longitudinally in the cylinder and having an inlet at its lower end, a piston surrounding the tubing in the cylinder, the tubing and piston having liquid passage ports communieating with the cylinder through the pist-on and below said piston, a valve in the tubing, and a weight on the piston for depressing it.

4. A hydraulic pumping system comprising, a cylinder adapted to be lowered into a well, a tubing extending longitudinally in the cylinder and having an inlet at its lower end, a piston surrounding the tubing in the cylinder, the tubing and piston having liquid passage ports communieating with the cylinder through the piston and below said piston, a valve in the tubing, a weight on the piston for depressing it, and a spring in the cylinder cushioning the weight,

5. A hydraulic pumping system comprising, a cylinder adapted to be lowered into a well, a tubing extending longitudinally in the cylinder and having an inlet at its lower end, a piston surrounding the tubing in the cylinder, the 'tubing and piston having liquid passage ports communicating with the cylinder through the piston and below said piston, an inlet Valve in the tubing, and an outlet valve in the tubing between said ports, and means carried by the piston for depressing it.

6. A hydraulic pumping system comprising, a cylinder adapted te be lowered into a well, a tubing extending longitudinally in the cylinder and having an inlet at its lower end, a piston surrounding the tubing in the cylinder, the tubing and piston having liquid passage ports, a sleeve in the tubing, an inlet valve mounted at the lower end of the sleeve, an outlet valve mounted in the sleeve, the sleeve and tubing having liquid passage ports between the valves, and weight means for depressing the piston.

7. A hydraulic pumping system comprising, a pumping cylinder adapted to be lowered into a well, a piston operating in said cylinder, a stationary tubing in said piston, the tubing communicating with the cylinder through the piston below the piston, valves within the tubing, ineens carried by the piston for forcing the same downwardly to displace liquid from the cylinder into the tubing and also to discharge it from the tubing, a tubing connected with the cylinder and piston, a controlling valve connected with the tubing, a pump connected with the valve, and automatic means for shifting the controlling valve to disconnect the pump with the tubing to open said tubing to discharge.

ROY B. BRYANT. 

